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2.731-81. . .


Unified system for designe documentation.

Graphic identifications in schemes.

Electronic tubes and valves

1981-07-01

1.

.., .., .., .., .., .., .., .., .., .., .., ..

2. 25.03.81 N 1561

3. 865-78

4. 2.731-68

5. -

6. ( 1997 .) N 1, 1987 . ( 7-87)

2.731-81 pdf


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: 04. 02. 2015


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